GeForce GTX 260 vs GeForce GTX 275

Intro

Compare all of that to the GeForce GTX 275, which comes with GPU core speed of 633 MHz, and 896 MB of GDDR3 memory running at 1134 MHz through a 448-bit bus. It also is comprised of 240 SPUs, 80 TAUs, and 28 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 260		182 Watts
GeForce GTX 275		219 Watts
	Difference: 37 Watts (20%)

Memory Bandwidth

The GeForce GTX 275 should theoretically perform a bit faster than the GeForce GTX 260 overall. (explain)

GeForce GTX 275		127008 MB/sec
GeForce GTX 260		111888 MB/sec
	Difference: 15120 (14%)

Texel Rate

The GeForce GTX 275 should be quite a bit (more or less 37%) faster with regards to AF than the GeForce GTX 260. (explain)

GeForce GTX 275		50640 Mtexels/sec
GeForce GTX 260		36864 Mtexels/sec
	Difference: 13776 (37%)

Pixel Rate

The GeForce GTX 275 will be a little bit (more or less 10%) faster with regards to anti-aliasing than the GeForce GTX 260, and also able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX 275		17724 Mpixels/sec
GeForce GTX 260		16128 Mpixels/sec
	Difference: 1596 (10%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the max amount of information (counted in MB per second) that can be transferred across the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.